package main

import (
	"bufio"
	"fmt"
	"net/http"
	"os"
	"strings"
)

const (
	BASE = "dict.cc/?s="
	VAR1 = "var c1Arr = new Array("
	VAR2 = "var c2Arr = new Array("
	SUFF = ");"
)

func main() {
	if len(os.Args) < 2 {
		println("usage:", os.Args[0], "word [{de|es|fr|en...}{de|es|fr|en|...}]")
		return
	}

	fromto := ""
	if len(os.Args) > 2 {
		fromto = os.Args[2] + "."
	}

	r, err := http.Get("http://" + fromto + BASE + os.Args[1])
	if err != nil {
		println("error:", err.Error())
		return
	}
	defer r.Body.Close()

	byline := bufio.NewScanner(r.Body)

	var left, right []string

	for byline.Scan() {
		line := byline.Text()
		if strings.HasPrefix(line, VAR1) {
			line = strings.TrimPrefix(line, VAR1)
			line = strings.TrimSuffix(line, SUFF)
			left = strings.Split(line, ",")
		} else if strings.HasPrefix(line, VAR2) {
			line = strings.TrimPrefix(line, VAR2)
			line = strings.TrimSuffix(line, SUFF)
			right = strings.Split(line, ",")
			break
		}
	}

	if len(left) != len(right) {
		println("error: arrays of different length")
		return
	}

	for i, _ := range left {
		a := strings.Trim(right[i], `"`)
		b := strings.Trim(left[i], `"`)
		if a == "" {
			continue
		}
		fmt.Printf("%25s → %s\n", a, b)
	}
}